:root{
  --bg:#0B0F14; --bg2:#11161D; --ink:#E6EDF3; --ink-dim:#9AA7B2;
  --line:#1E2833;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
main{max-width:1080px;margin:0 auto;padding:0 24px}
.site-header{
  display:flex;align-items:center;justify-content:space-between;
  max-width:1080px;margin:0 auto;padding:28px 24px 20px;
}
.brand{font-weight:800;letter-spacing:.14em;font-size:15px;color:var(--ink)}
.site-nav a{margin-left:26px;color:var(--ink-dim);font-size:14px;font-weight:600;letter-spacing:.02em}
.site-nav a.active,.site-nav a:hover{color:var(--ink);text-decoration:none}
.hero{padding:56px 0 40px;border-bottom:1px solid var(--line)}
.kicker{
  text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;
  color:#22D3EE;margin:0 0 14px;
}
.hero h1{font-size:44px;line-height:1.12;margin:0 0 20px;max-width:20ch}
.hero-sub{color:var(--ink-dim);max-width:62ch;font-size:17px}
.hero-actions{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:13px 22px;border-radius:8px;font-weight:700;
  font-size:14px;letter-spacing:.01em;
}
.btn-primary{background:#22D3EE;color:#0B0F14}
.btn-primary:hover{opacity:.88;text-decoration:none}
.btn-ghost{border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink-dim);text-decoration:none}
.section{padding:52px 0;border-bottom:1px solid var(--line)}
.section:last-of-type{border-bottom:none}
.section h2{font-size:26px;margin:0 0 26px}
.book-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:22px;
}
.book-card{display:block;color:var(--ink)}
.book-card:hover{text-decoration:none}
.book-card-cover{
  aspect-ratio:2/3;border-radius:10px;overflow:hidden;
  background:linear-gradient(160deg,var(--accent2) 0%,#0B0F14 55%,var(--accent) 130%);
  border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(0,0,0,.35);
  transition:transform .15s ease;
}
.book-card-cover img{display:block;width:100%;height:100%;object-fit:cover}
.book-card:hover .book-card-cover{transform:translateY(-3px)}
.book-card-meta{padding-top:12px}
.book-card-meta h3{font-size:15px;margin:0 0 4px;color:var(--ink)}
.book-card-meta p{font-size:13px;color:var(--ink-dim);margin:0}
.cta-band{text-align:center}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:var(--ink-dim);max-width:52ch;margin:0 auto 24px}
.book-hero{
  display:grid;grid-template-columns:280px 1fr;gap:44px;padding:52px 0 40px;
  border-bottom:1px solid var(--line);align-items:start;
}
.book-hero-cover{
  aspect-ratio:2/3;border-radius:12px;overflow:hidden;
  background:linear-gradient(160deg,var(--accent2) 0%,#0B0F14 55%,var(--accent) 130%);
  border:1px solid var(--line);
  box-shadow:0 12px 32px rgba(0,0,0,.4);
}
.book-hero-cover img{display:block;width:100%;height:100%;object-fit:cover}
.book-hero-copy h1{font-size:32px;margin:0 0 10px;line-height:1.2}
.subtitle{color:var(--ink-dim);font-size:15px;margin:0 0 18px}
.blurb{font-size:16px;max-width:60ch}
.inside-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.inside-list li{
  padding:14px 18px;border:1px solid var(--line);border-radius:8px;
  border-left:3px solid var(--accent);font-size:15px;
}
.about-body p{max-width:62ch;font-size:16px}
.terms-list{list-style:none;margin:0 0 40px;padding:0;display:grid;gap:12px;max-width:64ch}
.terms-list li{
  padding:14px 18px;border:1px solid var(--line);border-radius:8px;
  border-left:3px solid #22D3EE;font-size:15px;
}
.arc-form{max-width:520px;display:grid;gap:20px}
.arc-form .field{display:grid;gap:6px;font-size:14px;font-weight:600}
.arc-form .field span,.arc-form legend{color:var(--ink-dim);font-weight:600;font-size:13px;padding:0}
.arc-form input[type=text],.arc-form input[type=email],.arc-form input[type=url],.arc-form select,.arc-form textarea{
  background:var(--bg2);border:1px solid var(--line);border-radius:8px;color:var(--ink);
  padding:11px 13px;font-size:15px;font-family:inherit;resize:vertical;
}
.arc-form fieldset{border:none;padding:0;margin:0}
.check-grid{display:grid;gap:8px;font-weight:400;font-size:14px}
.check-row{display:flex;align-items:flex-start;gap:9px;font-weight:400;font-size:14px;line-height:1.5}
.check-row input{margin-top:3px}
.required-check{padding:14px;border:1px solid var(--line);border-radius:8px;border-left:3px solid #22D3EE}
.hp-field{position:absolute;left:-9999px}
.page-header{padding-top:52px}
.page-header h1{font-size:34px;margin:0 0 10px}
.back-link{padding:32px 0 60px;font-size:14px}
.site-footer{border-top:1px solid var(--line);margin-top:20px}
.footer-inner{max-width:1080px;margin:0 auto;padding:28px 24px;color:var(--ink-dim);font-size:13px}
.footer-links{margin-top:4px}
@media (max-width:720px){
  .book-hero{grid-template-columns:1fr}
  .book-hero-cover{max-width:220px}
  .hero h1{font-size:34px}
}